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Abstract

A horizontally scanning holographic display offers a wide viewing angle and a large hologram size. To obtain this display, a series of images generated by a high-speed spatial light modulator are imaged to vertically long images (elementary holograms) by an anamorphic imaging system and are aligned horizontally by a horizontal scanner. However, scan error and focusing error cause blurring in the reconstructed images. In this study, the scan error is corrected by measuring the positions and pixel pitches of the elementary holograms in advance. The focusing error is corrected by experimentally determining the focusing parameter that is used to calculate the elementary holograms.

Improvement of reconstruction image with correction of scanning and focusing errors when thin paper is placed around the front side of 3D image: (a) with correction of scanning error, and (b) with correction of scanning error and focusing error.